Using esxtop to Troubleshoot Performance Problems - VMware
VMware TECHNICAL TROUBLESHOOTING NOTE1VMware ESX Server 2Using esxtop to Troubleshoot Performance ProblemsThe VMware esxtop tool provides a real-time view (updated every five seconds, by default) of ESX Server worlds sorted by CPU usage. The term world refers to processes running on the VMkernel. There are three types of worlds:System: The worlds that are needed to perform various system services. These include one idle world per physical CPU that runs when there is nothing else to run on that physical CPU, helper worlds for performing asynchronous tasks and driver Console: The world for the service console. It always runs on physical Machine: The world for each virtual CPU. This is the world you look at when troubleshooting. Also, esxtop displays information about the state of the physical server running an ESX Server. It lists CPU utilization for each physical processor, memory utilization, and disk and network bandwidth for each network and disk device available to the ESX Server machine.
could be inactive; however, the use of swap space is a clue that you could be losing performance due to active swapping. If the swap percentage increases, there could be a performance problem. If the maximum system memory or swap space is exceeded, additional virtual machines will not power up and you may need to reconfigure memory and swap space.
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